Battery drainage due to input services

Been to an exhibition all day and experienced my PPSE getting very hot. When I looked up battery usage I reckoned input services have used 33%. I have not used the phone but for checking mails two or three times and two phone calls.

I even had to disable WiFi and Bluetooth to avoid running out of battery around lunchtime.

I have found two threads regarding this issue but unfortunately there was no solution to the problem.